Weaver’s Wave

  • Weaver's Wave (D Taylor)
    Weaver's Wave (D Taylor)

Scientific name: Idaea contiguaria britanniae

July – early August. In Britain a very local species known only from north-west Wales. Small pale grey moth with dark cross-lines. Frequents moorland areas, often with rocky outcrops.

  • Family - Waves (Sterrhines)
  • Small Sized

Conservation status

  • UK BAP:  not listed
  • Priority Species in Wales (‘Section 42’ list)
  • Nationally Notable

Particular Caterpillar Food Plants

Probably Heathers. Other moorland plants may also be used but this requires confirmation.


  • Countries – Wales
  • Only found in north-western Wales, and even here it is very local. Most often recorded in Caernarvonshire. There are additional records from Merionethshire and a single record from Montgomeryshire.


Mountains and moorlands, often with rocky outcrops.